Packing material.



'I PATENTED FEB.- 24, 1903.

G. R. HAYDEN. PACKING MATERIAL. AB-PLIUATION FILED 00T. a1, 1902` v`{mvENToR L7 www rus nomas Prznsco., PMcTmuTn. wnsnmn'ron, n. c.

UNITED STATES PAT-ENT OFFICE.

GEORGE R. HAYDEN, OF ALLEGI-IENY, PENNSYLVANIA.

PACKING MATERIAL.

SPECIFICATION forming part of Letters Patent N o. 721,440, datedFebruaryl, 1903.

Application filed October 3l, 1902. Serial Nol 129,520. (No specimens.)i

To a/ZZ whom, it ma, con/cerrar Be it known that I, GEORGE R. HAYDEN, acitizen of the United States, residing at Allegheny, in the county ofAllegheny and State of Pennsylvania, have invented or discovered certainnewand useful Improvementsin Pack'- ing Material, of which improvementsthe foli) part of this specification, is shown a form of packingembodying my improvement.

In the practice of my invention I provide a carrying-body formed of ametal oralloy suitable for bearings for movable parts. An alloy suitablefor this purpose consists of ten (l0) parts of nickel, sixteen (I6)parts of copper, four (4t) parts of antimony, and seventy (70) parts oftin. The invention is not, however,limited to the alloy mentioned,as theproportions of the ingredients may be changed, as well as theingredients themselves, it being only necessary that the carrying bodyor base should be formed of a metal or metals which will present acomparatively soft smooth surface to moving parts. The Vmetal or alloyemployed is changed to a spongy condition,

Which can be conveniently eifected by melting the metal or alloy andpouring through a sieve into a body of water, the sieve being held at aheight of five or six feet, more or less, above the surface of theWater. By this treatment a spongy mass is formed, which is subsequentlybroken up, forming small spongy or porous particles. To this spongycarrying body or base is added a mixture of finelydivided lead orgraphite equal in amount to about one-third of the base. In preparingthe mixture, the lead is melted in a suitable vessel and graphite,finely divided, is stirred in while the lead is maintained at a meltingtemperature. As a result of this 4mingled with the spongy carrying-body,the

line particles or flakes entering into the pores of Athe metal particlesand being held in .the interstices between adjacent particles. It ispreferred to place the bearing material vthus formed in a porous holder1, as shown inthe drawing. This holder maybe in the yform of a soft leadtube having perforated walls or may be made of loosely-woven ber, sothat the packing material proper-z'. e., the lead and graphite-mayV beforced out through the Walls of the holder. Ordinarily Y thelubricating-oil added from time to time to the parts to Which thepacking isapplied will render the mixture of lead and graphite -may beadded to the graphite and lead before mixing with the spongy carryingmetal or subsequent thereto.

In mixing the lead and graphite in the manner stated the fine particlesor grains of graphite seem to become coated with an exceedingly thinlayer of lead or thoroughly im pregnated with the lead, and theparticles or iiakes of the mass have no tendency to coalesce even whenheated to the temperature of molten lead.

I claim herein as my inventionl. A packing material having incombination a spongy metallic carrying body or base and a mixture ofnelydivided leadl and graphite, substantially as set forth.

2. A packing material having in combina.- tion a metallic alloy in theform of spongy or porous particles and a mixture of finely-divided lead,substantially as set forth.

v In testimony whereof I have hereunto set my hand.

GEORGE R. HAYDEN.

W'itnessesz` j DARWIN' S. WoLcoTT, F. E. GAITHER.

